Stormwater Retention Ponds

Floating Treatment Wetlands, an advanced approach in Storm Water Treatment

Floating Treatment Wetlands included in a treatment train approach to storm water is now a widely used and accepted approach. The abilities to remove suspended solids (TSS) flowing through storm water that come in contact with the Bio-Films attached to the root zones, are adhered to the Bio-Film. Floating Treatment Wetlands are based on surface area to achieve the Bio Remediation.

Surface area is referred to as the Bio Mediation Quotient (BMQ). One square metre of island matrix only at 200mm depth, (no plants and roots), equates to 200 square metres of surface area for the Bio-Film habitat. No official measurement have been made with roots because there is a variable between plant species.It is assumed that this would be more than double and would equate to 500 square metres.

Heavy metals and other pollutant type elements mostly are attached the TSS in the storm water. A basic understanding is that the pollutants attach to the fine colloidal particles within the TSS. 80% of the pollutants are adhered to 20% of the total volume of the TSS. This 20% of the TSS is the fine to almost colloidal faction.